At least four militants, including three from NDFB, were killed in separate incidents in Assam on Sunday.
Police said a group of NDFB militants were holed up in a village under Baksa district when a combined team of army and police challenged them.
A shootout took place in which three NDFB cadres were killed. Some arms and ammunition were recovered from them.
In another incident, a Dima Halam Daogah (Jewel) militant Maiban Dimasa (25) was shot dead by police at Longma village in North Cachar Hills district in the wee hours.
One AK-47 rifle and some ammunition was recovered from the slain ultra.
Police also said that seven live grenades were found from a passenger bus at Tamulpur in Kamrup (rural) district and two persons have been detained for interrogation.